First off, If you did research from unbiased resources, such as the trial transcripts of convicted (and murdered ) smuggler, (and DEA informant ) Barry Seal, you would be aware that the Sandinista Govt. had systematized drug transshipment, just like Noriega in Panama. What were the results ? Some where during all that drug smuggling the Contra's found time to force the Sandanista's to hold open, honest elections. Which they lost.
Any organization will produce a certain number of bad apples, for example child molesters among clergy (NOT just Catholics )
You also have the wrong angle on the heroin trade from Indochina.
Because of wartime anti German activities, as well as their participation in crushing the anti De Gaulle OAS, the "Union Corse" (Corsican version of the Mafia ) was cut a large amount of slack by the French Govt. this allowed them to, among other things, take over organized crime in several French port cities, particularly Marseille. It also allowed the to heavily infiltrate French police and intelligence services, (The "Action Service" of the SDECE was composed almost entirely of Corsican s )
It was more a case of the Union Corse subverting the SDECE to facilitate their heroin operation.